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S31655 Stainless Steel vs. EN 1.4518 Stainless Steel

Both S31655 stainless steel and EN 1.4518 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S31655 stainless steel and the bottom bar is EN 1.4518 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
34
Fatigue Strength, MPa 300
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 710
490
Tensile Strength: Yield (Proof), MPa 350
210

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 430
420
Maximum Temperature: Mechanical, °C 1010
1000
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
20
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
4.0
Embodied Energy, MJ/kg 46
55
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 27
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
140
Resilience: Unit (Modulus of Resilience), kJ/m3 310
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
17
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 4.0
4.1
Thermal Shock Resistance, points 16
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 19.5 to 21.5
18 to 20
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 63.2 to 71.9
61.4 to 70
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0.5 to 1.5
3.0 to 3.5
Nickel (Ni), % 8.0 to 9.5
9.0 to 12
Nitrogen (N), % 0.14 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.030